Every racing interest entering a horse in a claiming race does warrant that the title to said horse is free and clear of any existing claim or lien, either as mortgage, bill of sale, or lien of any kind, unless before entering such horse the written consent of the holder of the claim or lien has been filed with the stewards and the racing secretary and its entry approved by the stewards.
Cal. Code Regs. Tit. 4, § 1661